Anisotropic rod theory is normally used to model slender rods with the two dimensions of the cross section being in the same order of magnitude, e.g. \(w \! \sim \! t\)  for a strip with a rectangular cross section. Recent studies have shown that anisotropic rod model works quantitatively well for capturing the nonlinear mechanics of thin strips with \(w/t\)  up to \(O (10)\)  [1]}, [2]}, [3]}. Here, we use anisotropic rod theory to solve the nonlinear mechanics of creased annuli.
Throughout this study, we fix the aspect ratio of the cross section \(w/t\)  to 20.
